namespace Supermarket;

public sealed class Food : Product
{
    private const char AllergenSeparator = '|';
    private readonly SortedSet<AllergenType> _allergens;
    
    /// <summary>
    /// The constructor of Food
    /// </summary>
    /// <param name="productName">The product name</param>
    /// <param name="barcode">The bar code</param>
    /// <param name="quantity">The quantity</param>
    /// <param name="allergens">The allergens</param>
    public Food(string productName, string barcode, int quantity, params AllergenType[] allergens)
        : base(productName, barcode, quantity)
    {
        _allergens = new SortedSet<AllergenType>(allergens);
    }
    
    /// <summary>
    /// The allergens
    /// </summary>
    public AllergenType[] Allergens => _allergens.ToArray();
    
    protected override string[] CsvColumnNames => ["Barcode", "ProductName", "Quantity", "Allergens"];

    protected override string[] CsvColumnValues
    {
        get
        {
            string allergens = string.Join(AllergenSeparator, Allergens);
            return [Barcode, ProductName, Quantity.ToString(), allergens];
        }
    }
    
    /// <summary>
    /// Adds an allergen
    /// </summary>
    /// <param name="allergen">The allergen to add</param>
    /// <returns>True if the allergen was successfully added, false otherwise</returns>
    public bool AddAllergen(AllergenType allergen)
    {
        if (ContainsAnyAllergen(allergen))
        {
            return false;
        }
        
        _allergens.Add(allergen);
        return true;
    }
    
    /// <summary>
    /// Removes an allergen
    /// </summary>
    /// <param name="allergen">The allergen to remove</param>
    /// <returns>True if the allergen was successfully removed, false otherwise</returns>
    public bool RemoveAllergen(AllergenType allergen) => _allergens.Remove(allergen);

    /// <summary>
    /// Checks if the food contains any of the given allergens
    /// </summary>
    /// <param name="allergens">The allergens to check</param>
    /// <returns>True if any of the allergens are contained, false otherwise</returns>
    public bool ContainsAnyAllergen(params AllergenType[] allergens)
    {
        foreach (var allergen in allergens)
        {
            if (_allergens.Contains(allergen))
            {
                return true;
            }
        }
        
        return false;
    }
}